Display screen or portion thereof with a graphical user interface



The file of this patent contains at least one drawing/photographexecuted in color. Copies of this patent with colordrawing(s)/photograph(s) will be provided by the Office upon request andpayment of the necessary fee.

The FIGURE is a front view of a display screen or portion thereof with agraphical user interface, showing our new design.

The dotted and evenly-dashed broken lines, specifically, a 5-by-5 arrayof circles and an icon and text in the bottom left of the banner,illustrate portions of the graphical user interface that do notconstitute part of the claimed design.

CLAIM The ornamental design for a display screen or portion thereof witha graphical user interface, as shown and described.